KR100936479B1 - Pressure cooker comprising calibrated leakage means - Google Patents

Abstract

The calibrated bistable air release consists of upper and lower bodies (9A,9B) which are screwed or pressed together and have orifices (5,6) to the inside of the cooker and atmosphere respectively. During a first phase a bimetal disk (3) is open and allows air/vapour to escape through the small upper calibrated orifice at the same time as pressure and temperature in the cooker increase. When the disk closes the air release is cut off An Independent claim is also included for: A method for including a stage of air purging while the pressure cooker continues to build pressure and temperature

Description

Household pressure cooker with air leak control means {PRESSURE COOKER COMPRISING CALIBRATED LEAKAGE MEANS}

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to the field of conventional household products for cooking under pressure, such as a household pressure cooker, which includes a lid configured to lock the container and the container so as to increase the pressure inside the household pressure cooker and allow food contained in the container to be cooked under pressure. It is about.

The present invention relates to a home pressure cooker for cooking under pressure, such as a home pressure cooker comprising a cooking vessel and a lid configured to lock into the container so as to increase the pressure inside the home pressure cooker and allow food to be cooked under pressure.

The invention also relates to a method of cooking food at a pressure inside a container containing food or at a pressure in a closed container in which the temperature is increased.

It is already known that a home pressure cooker can be provided with a pintle or flap valve that responds to the pressure inside the home pressure cooker in an airtight manner or to seal the home pressure cooker above a predetermined pressure.

In general, such valve member systems are mounted to the lid of the household appliance to move on the valve seat between the lower and upper joint positions. Once the lid is locked to the container, the valve member systems gradually move from their lower joint positions to the upper joint positions under the influence of the heating of the gaseous medium present in the vessel at the start of cooking. Therefore, known systems respond to a gradual increase in pressure, releasing a small amount of air / vapor mixture until the valve member reaches the upper junction position.

Such systems can acceptably operate a pressure cooker, but suffer from impairments related to the cooking medium. The valve member arrives at the upper junction position at a coarse controlled and inaccurate temperature or pressure, in some cases at a low pressure or temperature (about 70 ° C.) that closes the valve member too early, so that the cooking medium is It still contains a negligible amount of air that harms well cooked food with an optimized cooking time.

Furthermore, in known domestic pressure cookers, the pintle system responsive to pressure also has an open or inadequate hermetic safety which acts to allow an increase in pressure inside the pressure cooker and therefore in the valve element system only when the lid is correctly positioned and locked. Associated with the device. Therefore, for safety reasons, the valve member systems are relatively low and in some cases are configured to reach the upper joint positions at pressure values of approximately 4 KPa or less, which is the value normally accepted for user safety opening. These devices prevent the escape of air that occurs at the start of cooking.

It is an object of the present invention to ameliorate the various drawbacks mentioned above and to be as completely as possible without preventing the increase in pressure or temperature increase step from occurring properly, in particular without delay in cooking time or deterioration of food quality. It is to provide a new method and a new home pressure cooker that can exhaust air from the home pressure cooker in a controlled manner with pressure.

It is a further object of the present invention to provide a new domestic pressure cooker capable of venting the air as effectively as possible before the appropriate cooking step, while providing the highest possible level of safety and locking the domestic pressure cooker as soon as the low pressure value is reached. .

It is a further object of the present invention to provide a new domestic pressure cooker which has a particularly simple and effective configuration and which does not interfere with the operation of other devices of the domestic pressure cooker, in particular the safety device.

Another object of the present invention is to provide a new domestic pressure cooker in which the discharge system is easily integrated.

Objects associated with the present invention are a home pressure cooker for cooking using pressure, comprising a cooking vessel and a cover (2) which is locked to the cooking vessel so that the pressure inside the home pressure cooker can be increased, the home pressure cooker Air leakage with two stable states that can take an open position in which the pressure inside the home pressure cooker continuously increases above a predetermined pressure P ₀ as air is discharged from the air, and a closed position where air does not leak out to the outside. Having a bistable calibrated leakage means, the open position being maintained for a predetermined time interval Δt after reaching the pressure P ₀ or its corresponding temperature value T ₀ , or a domestic pressure cooker Until the pressure or temperature present within the pressure reaches a predetermined pressure (P ₁ ) or temperature (T ₁ ), respectively, P ₁ > P ₀ and T ₁ > T ₀ . And the home pressure cooker is provided with one or more opening and closing safety means 15, 15A in the form of a valve whose position is sensitive to the pressure present in the cooking vessel, the opening and closing safety means having two stable joints. Position, that is, a first position that communicates the interior of the cooking vessel with the outside when the pressure is lower than the predetermined pressure P ₀ , and the pressure inside the home pressure cooker when the pressure reaches the predetermined pressure P ₀ . It is achieved by a home pressure cooker installed to move between the second position to seal the inside of the cooking container with the outside to increase the cooking.

Objects related to the present invention also,
Increasing the pressure or temperature inside the container containing food;
Air and vapor are discharged from the vessel at the same time as the pressure inside the vessel is increased, and this stage is continued for a sufficient time to reach almost all air from the vessel or when a predetermined pressure or temperature is reached Lasting until the air and steam is discharged;
The container is completely airtight and the discharge is stopped;
In the method of cooking the food in a pressure in a closed container comprising the step of cooking the food under pressure;
The pressure or temperature inside the container containing the food is increased by a home pressure cooker opening safety means that responds to the pressure and seals the container from a predetermined pressure, preferably 4 kPa or less, and the air and steam are discharged. The step is accomplished by a method of cooking food at pressure in a closed container, which is executed when the household pressure cooker opening safety means is closed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view showing a first embodiment of the air leakage control means of the present invention in response to temperature;

2 is a sectional view showing a second embodiment of the air leakage adjusting means of the present invention in response to pressure;

3 is a cross-sectional view of a third embodiment of the air leak control means of the present invention which is responsive to temperature and incorporated into a hermetic safety device;

4 is a sectional view showing a fourth embodiment of the air leakage control means of the present invention which is responsive to pressure and incorporated into a hermetic safety mechanism;

Fig. 5 is a sectional view showing a fifth embodiment of the air leakage adjusting means of the present invention in response to pressure;

FIG. 6 is a sectional view showing a sixth embodiment of the air leakage regulating means of the present invention which is responsive to temperature and incorporated in the valve side wall portion; FIG.

FIG. 7 is a sectional view showing a seventh embodiment of the air leakage adjusting means of the present invention corresponding to the embodiment shown in FIG. 5 but incorporated in a hermetic safety mechanism; FIG.

8 is a partially exploded perspective view of an eighth embodiment of the exhaust system of the present invention in response to time;

9A and 9B are cross-sectional views showing yet another embodiment of the exhaust system of the present invention in response to temperature.

In the following examples, the air exhaust system or air leak control means of the present invention increases the internal pressure of the cooking vessel (not shown) and the pressure inside the home pressure cooker in a manner known per se, so that food is properly cooked. It is integrated or mounted in a home pressure cooker for cooking under pressure in the form of a pressure cooker comprising a lid 2 which is locked or fitted to the container by any suitable means so as to enable it. The air exhaust system of the present invention locks the lid to the vessel, regardless of whether it is a locking bar, a ramp in the vessel and the lid, a jaw mounted to move radially, or some other system. Apart from the system for doing so, it is configured to be integrated and fitted into any type of pressure cooker. Household pressure cookers related to the present invention are therefore locking bar pressure cookers, socket-fit pressure cookers, radial jaw pressure cookers, or manhole pressure cookers, and these lists are given naturally by way of example and without limitation.

In the present invention, the home pressure cooker is a pressure corresponding to an appropriate cooking state before the home pressure cooker is adjusted to its normal pressure or before the pressure level is maintained at a constant level (for a pressure cooker having a visual pressure indicator). An air leak control means is provided which can exhaust all the air from the cooker. In the present invention, the air leak adjusting means may be in various forms in response to various modes of activation. Said air leakage control means is a bimetal disc 3, an adjustment opening 6, a valve pintle 10, a gasket 30, a valve member 51, a timer 60 described in various embodiments of FIGS. 1-9B. ), A valve pintle 80, of which bimetal disc 3, valve pintle 10, gasket 30, valve member 51, timer 60 function as a sealing element. The startup variable may be a temperature reacted by a gas carrier corresponding to the expected reference temperature or pressure, the pressure of the gas carrier, or else a predetermined time interval.

The general principle of the present invention is based on a leak control means or leak control system which exhausts air until a given temperature or pressure is reached while at the same time increasing the pressure inside the domestic pressure cooker to shorten the overall cooking time.

Therefore, the home pressure cooker of the present invention is an open position in which the pressure inside the home pressure cooker continuously increases up to a predetermined pressure P ₀ or higher while air is discharged from the home pressure cooker, and air does not leak to the outside. Air leakage control means having two stable states that can take a closed position, the open position being a predetermined time interval Δt after reaching a pressure P ₀ or a corresponding temperature value T ₀ . Or a pressure or temperature present in the home pressure cooker until it reaches a predetermined pressure P ₁ or temperature T ₁ , which is P ₁ > P ₀ and T ₁ > T ₀ , respectively.

Therefore, in the first embodiment, as shown in Fig. 1, the air leakage control means includes means for responding to a temperature, which means can be formed of, for example, a disc-shaped bimetal disc 3. An upper body 9A, which is integrated in the chamber 4 defined between the two parts, which are mounted to each other, in particular by means of interfitting, screwing or sheathing, and in which one is mounted on the other in a hole through the cover 2; It is formed by the lower body 9B. The upper body 9A communicates with the outside of the pressure cooker, which communicates with the atmosphere through any form of air leakage control means, for example a circular or elliptical adjusting opening 6. The lower body 9B communicates with the pressure cooker interior via an internal orifice 5 of any shape that is axially aligned with the adjustment opening 6.

Preferably, as shown in FIG. 1, the bimetal disc 3 can be held in place through its periphery by a serrated portion 4A spaced from the upper body 9A, between the serrated portions. The total cross-sectional area is naturally larger than the cross section of the adjusting opening 6, so that air and steam coming from inside the pressure cooker and exiting through the adjusting opening 6 can pass freely. The O-ring gasket 7 encloses the adjusting opening 6 so that the upper ring 9A acts as an airtight support of the bimetal disc 3 when the high sealing position is taken as shown in the left part of FIG. 1. It is located in the recess.

Therefore, in the position shown in the right part of FIG. 1, the bimetal disc 3 is kept in the open position so that at the start of cooking, air passes through the pressure cooker through its surroundings and between the serrated portions, and the air It is then discharged through the adjusting opening 6. In the position shown in the left part of FIG. 1, the bimetal disc 3 has a deformed shape due to an increase in temperature inside the pressure cooker and is thus directly bimetallic by itself in hermetic bonding to the O-ring gasket 7. The adjusting opening 6 is directly sealed at a characteristic temperature T ₁ , which is a characteristic of the disc 3 and corresponds to the metal deformation of the part.

As is well known to those of ordinary skill in the art, the deformation properties of the bimetal discs are reversible, and when the temperature drops again at the end of cooking, the bimetal disc 3 is in the left part of FIG. Correspondingly, return to the initial open position.

Therefore, in the present invention, the air leakage allowed by the adjusting opening 6 is controlled to be sufficiently small and that the pressure inside the pressure cooker can be normally increased without disturbing, while the adjusting opening 6 has a closed temperature of the apparatus. The air is allowed to evacuate until it is reached and the sealing temperature is 100 ° C. ± 2 ° C. or less, or preferably 102 ° C. ± 2 ° C., which makes it possible to allow the sealing temperature to be as high as about 104 ° C. After closure, the optimum food cooking temperature is reached and lies in the range of approximately 105 ° C to 120 ° C.

Preferably, in order to satisfy the above-mentioned sealing temperature, the air leak control means of the present invention comprises at least one adjusting opening 6 having a cross-sectional area of 1.75 to 4.15 mm 2, preferably 2.80 mm 2 and which can be leaked; A sealing element (bimetal disc 3 in this example) which is mounted to move in relation to the at least one adjusting opening 6.

While various variability parameters are taken into account to limit the limits of the desired control leakage cross section, the following scheme should be ensured.

Effective air evacuation without slight deviation from the ideal vapor pressure / temperature curve; And

Reliability of the device that must be run despite these various variables and the inevitable variances related to the test state and parts of the device.

Variables considered were discharge time, operating pressure, heating power, level of pressure cooker charge, and normal temperature of the steam.

By way of various embodiments (not shown in the figures), instead of the bimetal disk, the means for reacting to the temperature inside the domestic pressure cooker may comprise a wax actuator or solenoid valve associated with a temperature sensor or any equivalent means. According to a further variant shown in FIG. 2, the air leakage control means is a means of responding to pressure, and a heavy valve pintle mounted to freely slide in the bore in the cover 2 between two joining positions ( 10). When the pintle 10 is positioned as shown in the left part of FIG. 2, the respective dimensions and shapes of the bore ends of the pintle 10 are such that the adjustment opening 6 is provided between the pintle 10 and the lid 2. Provided on the outer periphery, air or steam is discharged until a predetermined pressure value P ₁ is reached. As a result, since the bottom portion of the pintle 10 has an O-ring gasket 7 supported by a collar, when the predetermined pressure P ₁ is reached, the pintle 10 is the right side of FIG. 2. Reaching the high position shown in Fig. 5, the O-ring gasket 7 closes the adjusting opening 6 in an airtight manner.

Therefore, in the present invention, the air leakage control means having two stable states are capable of counting the time interval or the means reacting to temperature or pressure, or the means for closing or releasing the control opening 6 and the control means. It is formed by engaging the opening 6.

By way of a further variant, as shown in FIGS. 9A and 9B, the bimetal disc 3 engages a heavy valve pintle 80, an air leakage control means having spikes 81 at one end. The spike may be configured to engage with a spike receiving seat formed by the upper portion 82 of the hollow tubular body 83, the tubular body being fitted to the lid 2 by any known means so that the orifice ( 5) communicate the inside of the pressure cooker with the outside. In this variant, the bimetal disc 3 is secured inside the upper body 85 forming the cap, and is formed with a stunelled collar projecting radially from the tubular body 83 in the rest position. It fits over tubular body 83 to join with 86. In this embodiment, the bimetal disc 3 extending across the interior of the upper body 85 has a central hole, and a heavy valve pintle 80 is axially mounted and fixed at the central hole, and the valve pintle ( 80 axially protrudes from the upper body 85 via the freely sliding bore, so that at the start of cooking (FIG. 9A), an adjustment opening defined between the outer periphery of the spike 81 and the upper portion 82 ( 6) is opened in correspondence with an open or discharge position allowing the air leakage control means to discharge air. The temperature corresponding to the shape changing bimetal disc 3 can cause the upper body 85 to move radially upwards, and can cause the spike 81 to move in the opposite direction, and towards the upper end 82. The adjustment opening 6 is closed by making it airtight.

In this variant, the bimetal disc 3 and the heavy valve pintle 80 may be pre-mounted to the upper body 85 to form one accessory initially placed in place on the body 83.

In this variant, the air leakage control means comprises a heavy weight valve pintle 80 supported by the bimetal disc 3, with the bimetal disc facing towards the opening 5 in the lid 2. The valve pintle 80 is hermetically sealed when the bimetal disc 3 is in a closed position (FIG. 9B), supported by the main body 85 to be installed and corresponding to a sealed discharge and temperature state T ₁ . The adjustment opening 6 is formed between the opening and the valve pintle forming a seating portion that can be accommodated therein. In this variant, the opening 5 is located below the tubular body 83, the upper part 82 of the tubular body forming a seat for receiving the valve pintle 80, and the body 85. Is formed as a removable cap fitted over the tubular body 83.

By way of a further variant, the adjusting opening 6 may also be formed as an opening consisting of the studs 86 of the toothed projection (FIG. 9A). In this variant, the technical measures implemented are the same as in the preceding variant, but they are organized differently enough. Therefore, the air leakage control means comprises a heavy weight valve pintle 80 supported by the bimetal disc 3, the bimetal disc being installed to face toward the opening 5 in the lid 2. Supported by (83), the opening (5) forms a seat for receiving the valve pintle (80) in an airtight manner when the bimetal disc (3) is in a closed position, and the adjustment opening (6) It is formed with an opening in the form of a serrated protrusion formed in contact with the tubular body 83 when the air discharge is opened.

Preferably, the domestic pressure cooker of the present invention may be provided with a pressure cooker having a valve member mounted to move between two stable joining positions, the position of which responds to the pressure in the container. In the first stable position, the safety means communicate the inside of the container with the outside when the pressure is below the predetermined pressure P ₀ , and in the second stable position the safety means has reached the pressure P ₀ . By blocking the communication between the vessel and the outside when the pressure inside the home pressure cooker is increased and cooking can be made. Such opening and closing safety means are well known to those of ordinary skill in the art, which makes it possible to ensure that the lid is actually in a stable locking position in the container, and when the stable locking position is reached It is only possible for the valve member to move under pressure. This prevents the pressure from increasing when the lid is improperly locked. Conversely, since only the low position of the safety valve member causes the home pressure cooker to open, this open / close safety means prevents the home pressure cooker from being opened accidentally while the residual pressure remains in the home pressure cooker.

By combining the air leakage control means having two stable states according to the present invention with the opening and closing safety means, it is possible to obtain a pressure cooker which is very safe and easily starts the safety system, and raises and interferes with the valve member of the closed safety means. By the presence of air leakage control means that are not, it is possible to obtain good user safety while effectively evacuating air from the home pressure cooker.

In a particularly preferred variant, the domestic pressure cooker of the present invention is provided with air leak control means which are themselves integrated in a safety appliance. Modifications of the invention corresponding to this configuration are shown in FIGS. 3, 4 and 7.

According to a preferred variant of the invention shown in Figs. 3, 4 and 7, the air leakage control means having two stable states are the opening and closing safety means 15 constituting the pressure cooker closing safety means in the sense of the present invention. Is incorporated into or supported by Aroma pintle. The aroma pintle, the opening and closing safety means 15 in the form of a pressure-gauge rod, has an opening / closing prevention function that can lock the lid 2 to the container as soon as the inside of the pressure cooker reaches a minimum pressure, such as about 4 kPa. Is provided to perform. As soon as the aroma pintle, the opening and closing safety means 15, reaches a minimum pressure value, it rises from a low joining position (shown in FIG. 3) to reach a high joining position where the pressure cooker is pressure tight. In the high bonding position, the aroma pintle is engaged in a corresponding hole provided in the fixing member of the pressure cooker (for example, fixed to the container handle), thereby preventing opening and closing of the pressure cooker. Such safety measures are well known to those of ordinary skill in the art and will not be described further below.

The variant shown in FIG. 3 is a bimetal disc mounted in a chamber 4 provided between the bottom part of the body 16 of the aroma pintle, the opening and closing safety means 15, and the separate part 17 mounted on the bottom part. It includes (3). The chamber 4 is connected to the outside and inside of the pressure cooker through a channel 18 through the body 16 and through an opening 5 through the separate part 17 in axial alignment with the channel 18, respectively. Communicate The bimetal disc 3 is at least partially retained and elastically supported by an O-ring gasket 7 in the chamber 4 as shown in the right part of FIG. 3, and the bimetal disc 3 is at a predetermined minimum temperature T As soon as ₁ ) reaches the inside of the pressure cooker, the adjusting opening 6 is closed. The left part of FIG. 3 shows the bimetal disc 3 in a position to open the adjustment opening 6 in response to the deforming bimetal disc 3, where the deformation of the bimetal disc 3 is at a predetermined temperature T _1. Related to lower temperature values. In this open position, the air is discharged from the pressure cooker through the orifice 5 and the channel 18 through the adjustment opening, even though the aroma pintle, the opening and closing safety means 15, makes a high sealing position, and the annular O-ring The gasket 19 is airtight and elastically bonded toward the bottom surface of the cover 2. In this position, the pressure inside the pressure cooker increases from the start of cooking while at the same time allows the air / vapor mixture to be discharged. In this variant, the air leak control means are integrated into the aroma pintle, the opening and closing safety means 15, and by means of a moving sealing element, these comprise a bimetal disc supported by the aroma pintle, the opening and closing safety means 15. do.

4 shows an embodiment in which the exhaust system of the present invention responds to pressure. In this variant, the air leak control means is integrated into the first aroma pintle, the opening and closing safety means 15, and concentrically with the first aroma pintle (by being disposed outside or preferably inside the first aroma pintle). It is formed with the 2nd aroma pintle which is 15 A of opening and closing safety means, and is mounted so that it may move to an axial direction with respect to each other. This variant therefore comprises a sealing of the discharge orifice 21 provided between the outer periphery of the body 16 and the inner periphery 16A of the second aroma pintle, the opening and closing safety means 15A, for example of about 4 kPa. As soon as the first pressure level is reached, the first aroma pintle, the opening and closing safety means 15, corresponds to the double aroma pintle which makes the pressure cooker pressure tight. The second aroma pintle, the opening and closing safety means 15A, has a bore in the outer periphery of the body 16A and the pressure cooker when the first aroma pintle, the opening and closing safety means 15, is in a high bonding position. The adjustment opening 6 provided between them is opened. In this position, although the pressure inside the pressure cooker increases, discharge occurs before the final pressure is reached. As soon as the final automatic pressure is reached, the second aroma pintle, the opening and closing safety means 15A, takes a high bonding position in which the O-ring gasket 7 closes the adjusting opening 6 in an elastic, airtight manner.

The variant shown in FIG. 5 is a means for responding to pressure, which is formed by a deformable gasket 30 which is driven by pressure to seal at least one regulating opening 6, preferably a plurality of regulating openings 6. The air leak control means is shown. In this variant, the deformable gasket 30 is integrated in the pressure cooker, for example in the cover 2, and is connected to the edge of the bore via one of the ends 32 and by fitting into the other end 33. And a deformable diaphragm 31 defining a central hollow portion 34 through the wall provided with one or more adjusting openings 6 in the vicinity of the < RTI ID = 0.0 > This configuration is formed by a kind of convex protrusions, in which the central region is folded inward and opened to form the central recessed portion 34. The central recess 34 has a sealing surface 35 which forms a sealing protrusion which acts to press toward the body of the gasket formed by the bottom surface of the end 32 from a predetermined pressure value lower than the reference value P ₁ . Is terminated by The left half part of FIG. 5 shows the sealing position of the deformable diaphragm, which is reached from a predetermined pressure value P ₁ , while the right half part of FIG. 5 is of the deformable diaphragm 31. The open position is shown. In the open position, air can be discharged from the pressure cooker even though the pressure increases simultaneously in a conventional manner.

FIG. 7 shows a variant using the configuration of the deformable gasket 30 as shown in FIG. 5. In this variant, the deformable gasket 30 incorporates a conventional aroma pintle mounted to a central hollow portion 34 so as to be able to slide freely between two stable bonding positions. As shown, the sealing surface 35 has a hole 40 in which the aroma pintle, which is the opening and closing safety means 15, is mounted so as to slide freely, and both sides of the sealing surface 35 around the hole 40 are open and close safety. A sealing sheet is formed for the two bonding positions of the aroma pintle, the means 15. The discharge system of the present invention is obtained in connection with a pressure cooker opening and closing safety means.

The variant shown in FIG. 6 shows the exhaust system of the invention integrated in the side wall part 50 of the valve member 51, which is an air leakage control means. The valve member side wall portion 50 is the neck portion 52 of the safety valve member 53 by a helical spring 54 fitted in the groove 55 in the side wall portion 50 between the side wall portion and the lid 2. It is installed to elastically tighten to the return position toward the side. The bimetal disc 3 is sandwiched between the neck portion 52 and the head of the side wall portion 50. When the bimetal disc 3 is in the open position, the legs 57 of the side wall portion 50 settled in the bottom part open the adjustment opening 6 through the lid 2. When the temperature in the cooking vessel reaches a critical temperature for starting the bimetal disc 3, the bimetal disc is snapped to move in the axial direction against the spring force exerted by the helical spring 54. ), The adjusting opening 6 can be sealed by the legs 57. In this position, the exhaust system is sealed, and the air leak control means of the present invention comprises a bimetal disk 3 mounted elastically with respect to the side wall portion 50 of the valve member 51, wherein the side wall portion is provided with an adjustment opening ( 6, the side wall portion opens or closes the adjusting opening 6 in accordance with the position of the bimetal disc 3.

8 shows a domestic pressure cooker of the present invention comprising an air leakage adjusting means having two stable states for discharging air from the domestic pressure cooker, wherein the air discharge is a predetermined pressure value P ₀ . Or maintained for a predetermined time interval [Delta] t after the corresponding temperature value T ₀ is reached.

In this variant, the domestic pressure cooker has a conventional type timer 60 with means for counting a predetermined time [Delta] t from the moment when the reference pressure P ₀ or the temperature T ₀ is reached, and the adjustment opening ( 6) a system 61 for opening and closing. System 61 also incorporates a pressure or temperature sensor that senses the time at which pressure P ₀ or temperature T ₀ is reached. This assembly forms an air leak control means which is preferably integrated in the cover 2 of the pressure cooker. At the start of cooking, the timer counts the time [Delta] t that all the air can withdraw from the pressure cooker through the adjustment opening 6. At the end of cooking, the pressure or temperature sensor integrated in the timer senses the drop in pressure or temperature and therefore allows the air leakage control means of the present invention to open again.

In all the examples described above, the air leak regulating means is present by being integrated or fitted into the cover 2 of the pressure cooker. However, in the sense of the present invention, it is possible to incorporate such air leakage control means in other parts of the pressure cooker, in particular in the vessel or means for manipulating the pressure cooker without departing from the scope of the invention.

Similarly, the preceding examples represent household pressure cookers with air leak control means that allow air to escape from the household pressure cooker as a function of the movement of the hermetically mounted sealing element. In the present invention, this element can be controlled by means well known to those skilled in the art, in particular in the form of radio or electromagnetic waves.

The invention also relates to a method for cooking food at vapor pressure in a closed container, in which the pressure or temperature in the container containing the food is allowed to increase. Preferably, the pressure or temperature inside the vessel is allowed to increase by means of pressure cooker opening or closing safety means, which means closes the vessel from a pressure equal to 4 kPa in response to the pressure. In the present invention, the method is characterized by the following:
Air and vapor are discharged from the vessel at the same time as the pressure inside the vessel is increased, and this stage is continued for a sufficient time to reach almost all air from the vessel or when a predetermined pressure or temperature is reached Lasting until the air and steam is discharged;

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The container is completely airtight and the discharge is stopped;
The food is cooked under pressure.

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Preferably, the pressure or temperature inside the container containing the food is increased by a home pressure cooker opening safety means that responds to the pressure and seals the container from a predetermined pressure, preferably 4 kPa or less, and the air And the step of evacuating the steam is carried out when the household pressure cooker opening safety means is closed.

Preferably, the method of the present invention may vent the air so that the food can be cooked under atmospheric pressure where only steam is present.

Preferably, the air evacuation step is carried out until an average vessel temperature of approximately at least 96 ° C. is reached or an average pressure of at least 150 millibars is reached.

Preferably, the air evacuation step is in the temperature range of 96 to 104 ° C, more preferably 96 to 102 ° C.

The air exhaust system of the present invention can significantly reduce the overall cooking time and increase the temperature of the food more quickly, so that the vitamins of the food can be better maintained due to the absence of the air / vapor mixture in the cooking vessel. The system of the present invention also satisfies the general relationship of limiting the increase in temperature of water under pressure, and it is possible to limit the loss of vitamin and mineral salts from food.

In addition, interruption of the discharge of meat makes it possible to prevent the oxidation of food, which ensures the quality of cooking.

The present invention can be applied to an industry for manufacturing and designing a home pressure cooker in the form of a pressure cooker for cooking food, in particular a home pressure cooker for cooking food under pressure.

Claims (24)

A pressure cooker for cooking using pressure, comprising: a cooking vessel and a cover (2) submerged in the cooking vessel so that the pressure inside the household pressure cooker can be increased, the air being discharged from the household pressure cooker; A pressure release means having two stable states, which can take an open position in which the pressure inside the home pressure cooker continuously increases to a predetermined pressure P ₀ or higher, and a closed position in which no air leaks to the outside; The open position is maintained for a predetermined time interval Δt after reaching the pressure P ₀ or the corresponding temperature value T ₀ , or the pressure or temperature present in the domestic pressure cooker is each P ₁ 〉 P _Is maintained until a predetermined pressure (P ₁ ) or temperature (T ₁ ), which is ₀ and T ₁ > T ₀ , is reached and the household pressure cooker is One or more opening and closing safety means (15, 15A) in the form of a valve that is responsive to the pressure present in the cooking vessel, wherein the opening and closing safety means have two stable joining positions, i _. Lower than the first position for communicating the inside of the cooking vessel with the outside, and when the pressure reaches the predetermined pressure (P ₀ ), the pressure inside the home pressure cooker is increased to enable cooking. A home pressure cooker installed to move between a second position that seals the interior and the exterior. The method of claim 1, Said air leakage control means comprise at least one regulating opening 6 having an opening cross section of 1.75 mm 2 to 4.15 mm 2 and a leaking element and a sealing element movably installed in relation to said at least one regulating opening 6. Household pressure cookers. The method of claim 1, Said air leak control means comprises at least one regulating opening 6 having an opening cross-section of 2.80 mm 2 and in which a leak occurs, and a sealing element movably installed in relation to said at least one regulating opening 6. Pressure cooker. The method according to any one of claims 1 to 3, And said air leakage control means comprises means for responding to a temperature in said domestic pressure cooker. The method of claim 4, wherein Said air leak control means comprises a solenoid valve associated with a bimetal disc (3), a wax actuator, or a temperature sensor. The method of claim 5, wherein The air leak control means comprises a heavy weight valve pintle 80 supported by a bimetal disc 3, the bimetal disc being installed to face toward the bulb 5 in the cover 2. Between the opening 5 and the valve pintle, which is supported by the bimetal disc 3, which forms a seating portion for receiving the valve pintle 80 in a hermetic manner when the bimetal disc 3 is in a position where air discharge is sealed. Household pressure cooker, characterized in that the opening for adjustment (6) is formed. The method of claim 6, The opening 5 is located below the tubular body 83, the upper portion 82 of the tubular body forms a seat for receiving the valve pintle 80, and the body 85 is the tubular body 83. A pressure cooker for home, characterized in that it is formed of a removable cap fitted on the). The method of claim 5, wherein The air leakage control means comprises a heavy weight valve pintle 80 supported by a bimetal disc 3, the bimetal disc being installed to face toward the opening 5 in the lid 2 83. And the opening (5) forms a seat for receiving the valve pintle (80) in an airtight manner when the bimetal disc (3) is in a closed position, and the adjustment opening (6) releases air. The pressure cooker for home, characterized in that it is formed by an opening in the form of a toothed protrusion formed in contact with the tubular body (83) when it is opened. The method according to any one of claims 1 to 3, Said air leakage control means comprises means for responding to a pressure in a domestic pressure cooker. The method according to any one of claims 1 to 3, Said air leakage control means is integrated in said opening and closing safety means (15, 15A). The method of claim 10, Said air leak control means is integrated in an aroma pintle which is an opening and closing safety means (15,15A), and has a bimetal disk (3) which is a movable sealing element supported by said aroma pintle. The method of claim 10, The air leak control means is integrated into a first aroma pintle, the opening and closing safety means 15, and a second opening and closing safety means 15A concentric with the first aroma pintle and installed to move relative to the first aroma pintle. Pressure cooker for home, characterized in that it is formed of an aromatic pintle. The method of claim 9, Said air leakage control means is formed of a deformable gasket (30), said gasket being pressure driven to be deformable to close said regulating opening (6). The method of claim 13, The deformable gasket 30 has a deformable diaphragm having a central recessed portion 34 which is integrated into a bore in the cover of the home pressure cooker and is provided with one or more adjusting openings 6. The recess is formed at the end thereof with a sealing surface (35), said sealing surface being configured to press into the body of the gasket to form a sealing sheet at a pressure of at least P ₁ . The method of claim 14, The central recess 34 is a pressure cooker, characterized in that the aroma pintle which is the opening and closing safety means 15 is mounted so as to be able to slide freely between the two bonding positions. The method of claim 4, wherein Said air leakage control means comprises a valve member (51), said valve member (51) being integrated into the side wall portion (50) of the safety valve member (53). The method of claim 16, The valve member 51 includes a bimetal disk 3 elastically mounted in contact with the side wall portion 50 of the safety valve member 53, and the side wall portion 50 is provided in the adjustment opening 6. It is mounted so as to move relative to the home pressure cooker, characterized in that it can open or close the adjusting opening (6) in accordance with the position of the bimetal disk (3). The method of claim 1, The air leakage control means is a pressure (P ₀₎ or a temperature time and pressure or temperature sensor for sensing the amount of time that reaches the (T _0), a pressure determined in advance from a moment to reach the (P ₀₎ or a temperature (T ₀₎ ( And a timer (60) for counting Δt) and an opening and closing system (61) for opening and closing the regulating opening (6). The method according to any one of claims 1, 2, 3 or 18, Said air leakage control means is a household pressure cooker, characterized in that it is installed on the cover (2) of the household pressure regulator. Increasing the pressure or temperature inside the container containing food; Air and vapor are discharged from the vessel at the same time as the pressure inside the vessel is increased, and this stage is continued for a sufficient time to reach almost all air from the vessel or when a predetermined pressure or temperature is reached Lasting until the air and steam is discharged; The container is completely airtight and the discharge is stopped; In the method of cooking the food in a pressure in a closed container comprising the step of cooking the food under pressure; The pressure or temperature inside the vessel containing the food is increased by a home pressure cooker opening safety means that responds to the pressure and seals the vessel from a predetermined pressure of 4 kPa or less, wherein the step of evacuating the air and steam is carried out in the household. Pressure cooker opening A method of cooking food under pressure in a closed container, which is carried out when the safety means closes. The method of claim 20, Wherein almost all of the air is discharged so that the food can be cooked under atmospheric pressure in which only steam is present. The method of claim 20 or 21, Wherein said evacuating air and steam is performed until the vessel average temperature reaches 96 ° C. or until the average pressure reaches 150 millibars. The method of claim 22, Wherein the air and steam is discharged is characterized in that the temperature range of 96 to 104 ℃. The method of claim 22, The air and steam is discharged is characterized in that the temperature range of 96 to 102 ℃.

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